"Is there a doctor in the house, please? Doctor? Please. Thank you," Trump said, pointing toward the crowd gathered on the floor of the Show Me Center.

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The president urged medical staff that converged on the woman to take their time as he stepped away from the podium. At one point, he urged the crowd to "say a little prayer," and attendees behind the stage could be seen bowing their heads.

A short time later, the audience began singing "Amazing Grace."

WATCH: Supporters sing "Amazing Grace" as emergency workers respond to a medical incident in the crowd at a Trump rally in Missouri pic.twitter.com/dR3yTa7Vnn